Great post Rybo! You summed up a lot of what I was going to say.

The only thing I will add is that to answer the original question I believe that the deer in some of the places I hunt are pressured before the opener. There are a lot of guys that go in and build or hang stands, take shotguns into the woods to blast off some rounds, ride motorcycles and quads, etc. All activities that ramp up as the season gets closer. This absolutely puts pressure on the deer and is why some will be nocturnal by the end of July.